<template>
  <div class="star" :class="starType">
    <span v-for="itemClass in itemClasses" :class="itemClass" class="star-item"></span>
  </div>
</template>

<script type="text/ecmascript-6">
  const LEGNTH = 5;
  const CLS_ON = 'on';
  const CLS_HALF = 'half';
  const CLS_OFF = 'off';

  export default {
    props: {
        size: {
            type: Number
        },
      score: {
            type:Number
      }
    },
    computed: {
      starType() {
          return 'star-' + this.size;
      },
      itemClasses() {
          let result = [];
          let score = Math.floor(this.score * 2) / 2;
          let hasDecimal = score % 1 !== 0;
          let integer = Math.floor(score);
          for (let i=0; i< integer; i++) {
              result.push(CLS_ON);
          }
          if (hasDecimal) {
            result.push(CLS_HALF);
          }
          while (result.length < LEGNTH) {
            result.push(CLS_OFF);
          }
          return result;
      }
    }
  };
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixin.styl"
  .star
    font-size: 0
    .star-item
      display: inline-block
      background-repeat: no-repeat
    &.star-48
      .star-item
        width: 22px
        height: 22px
        margin-right: 22px
        background-size: 22px 22px
        &:last-child
          margin-right: 0
        &.on
          bg-image('star48_on')
        &.half
          bg-image('star48_half')
        &.off
          bg-image('star48_off')
    &.star-36
      .star-item
        width: 15px
        height: 15px
        margin-right: 16px
        background-size: 15px 15px
        &:last-child
          margin-right: 0
        &.on
          bg-image('star36_on')
        &.half
          bg-image('star36_half')
        &.off
          bg-image('star36_off')
    &.star-24
      .star-item
        width: 10px
        height: 10px
        margin-right: 3px
        background-size: 10px 10px
        &:last-child
          margin-right: 0
        &.on
          bg-image('star24_on')
        &.half
          bg-image('star24_half')
        &.off
          bg-image('star24_off')

</style>
